What can datasource do for you? DataSource provides instant web-based access, allowing you to see alarm activity, system performance, maintenance activity, billing information and more, including open-and-close exception notifications for your remote facilities. Watch this short video to better understand the capabilities of DataSource.How do i contact public data? The easiest way to contact us is by email. For general questions, please use: [email protected] (attachments not accepted) For billing, invoice, or charging questions, please email us at: [email protected] (attachments not accepted)How do i contact eversource customer service? Email: [email protected] Fax: 1-800-842-4115 Mail: Eversource ESSC, PO Box 2985, Hartford, CT 06104-2985 Where is the ese source office located? E Source headquarters. 1745 38th Street. Boulder, CO 80301. New York office. 640 Ellicott Street, Suite 499. Buffalo, NY 14203. Louisiana office. 2351 Energy Drive, Suite 1010. Baton Rouge, LA 70808.